public int ProgramChanged(object varProgramDescriptionID)
{
Trace.WriteLineIf(trace.TraceInfo, "EPG.IGuideDataEvent_ProgramChanged(" + varProgramDescriptionID + ")");
(new GuideDataEventDelegate(this.AsynchroneEventCallback)).BeginInvoke(GuideDataEventType.ProgramChanged, (string)varProgramDescriptionID, null, null);
return 0;
}